Question

find lcm of 15,25,90 by division method​

Answer 1

Answer:

prime factors of 15 and 25.

Prime Factorization of 15

3 15

5 5

1

Prime factors of 15 are 3,5. Prime factorization of 15 in exponential form is:

15 = 31×51

Prime Factorization of 25

5 25

5 5

1

Prime factors of 25 are 5. Prime factorization of 25 in exponential form is:

25 = 52

Now multiplying the highest exponent prime factors to calculate the LCM of 15 and 25.

LCM(15,25) = 31×52

LCM(15,25) = 75

Factors of 15

List of positive integer factors of 15 that divides 15 without a remainder.

1, 3, 5, 15

Factors of 25

List of positive integer factors of 25 that divides 25 without a remainder.

1, 5, 25

Answer 2

Answer:

15=5*3

25=5*5

90=5*18

LCM=5